This is the Analysis page for GRB230321182: GRB230321182

Version History of Data Files: v01 v00 tte_v00

GRB Properties

Parameters calculated by MPE

Property Value Error (1 σ statistical)
Trigger Number 701065308
Trigger Time March 21, 2023, 04:21:43
Data Timestamp March 21, 2023, 06:19:51
Localization Timestamp March 21, 2023, 06:46:44
Balrog Ra [deg] 65.6 1.7
Balrog Dec [deg] 31.6 1.3
Error radius 1 σ [deg] 2.3
Error radius 2 σ [deg] 3.0
Estimated systematic error [deg] 2
Fitted Model cutoff_powerlaw
Spectral Parameter K [photons/cm^2/keV*s] 6.5 1
Spectral Parameter Index -1.3 0.05
Spectral Parameter XC [keV] 3e+02 4e+01
Satellite Phi [deg] 52.35
Satellite Theta [deg] 40.34

Parameters from external Source

Property Value
Swift Ra [deg]
Swift Dec [deg]
Most likely GRB 64.0%
Second most likely DISTANT_PARTICLES 31.0%

GRB Location Alert

GRB 230321A: BALROG localization (Fermi Trigger 701065308 / GRB 230321182)

F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
701065308 at 04:21:43 on 21 Mar. 2023 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 65.24+/-1.54 deg
Decl.(2000.0) = 31.70+/-1.26 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:

The Healpix map can be downloaded from:

The location parameters are available as JSON at:

GRB Location

J2000 Coordinate Frame

All Corner Plot

J2000 Coordinate Frame

Moll Location Plot

J2000 Coordinate Frame


Spectrum Residuals Plot

3D - GRB Location Plot

Satellite Coordiante Frame

Light Curves

Lightcurve detector b0
Lightcurve detector b1
Lightcurve detector n0
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Lightcurve detector n7
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Lightcurve detector n9
Lightcurve detector na
Lightcurve detector nb